diff --git a/src/shop/coinify.py b/src/shop/coinify.py
index 2cc1c259..ecc29a3e 100644
--- a/src/shop/coinify.py
+++ b/src/shop/coinify.py
@@ -13,7 +13,7 @@ def process_coinify_invoice_json(invoicejson, order):
         coinify_id=invoicejson['id'],
         order=order,
         defaults={
-            invoicejson: invoicejson
+            'invoicejson': invoicejson
         },
     )